Leather-splitting machine



A. C. HAHLBECK LEATHER SPLITTING MACHINE Filed March 5, 1926 I N VEN TOR.

I 9' 4, JQJGVLZM ATTORNEYS v UNITED STATES PATENT OFFICE...

A'U'Gi-US'lI 'C. HAHLBECK, OF W AUWATOSA, WISCONSIN.

LEATHER SPLITTING MACHINE;

Application filed March 25, 1926. Serial No. 97,181

Thisinvention relates to improvements in leather-splitting machines, and more. particularly to the construction of the socalled ring-roll thereof.

In machinesof. the character referred to the hide to be split is fed to the .knife throughnn, upper gage roll and a lower feed orring-roll, thelatter being supported by and driven by frictional engagement with a relatively large rubberroll which is positively driven. Therings or sections of the feedor ring-rollhave heretofore been loosely mounted on a supporting rod for, lateral or radial shifting with respect to each other forthe purpose. of. accommodating irregularities in. the hide without causing deflection of the greater part of the feed or ringrollout of driving engagement with the underside of'the hide, as is the case where the feed rollis made of a single rigid piece and an irregularity is encountered. With these sectional or ring-rolls, however, wherein the sections arev shiftable laterally. or radially with respect to each other for the purpose explained, difiiculty is experienced by reason of the ringszor sections tilting upon encountering an irregularity in the hide, this tilting of the sections causing. ring marks or grooves in the leather.

Infbeing fed .to-the cutting edge of the knifebetween the, gage. and ring-rolls, rheskirts or marginal edges of the hide often travelat a greater rate than the thicker middle portion thereof. When this occurs the.

operator pullsback on these edges to retard forward movement thereof so that the hide is fedto the knife evenly. In some types of feed or ring-rolls constructed heretoforetlie.

ringsarepositively driven, so that retardation of the edges of thehide is OHlY-ZV QCQHP plished by hard pulling on the part of the operator, this retardation being accompanied by-complete slipping of the hide with respect the leather.

o; qnne t the: n o 1 ackw e t e oatiqn q e h ibr .me sptsl p qn eqt ens. perm tting. ela re r ary cr ment. if. the. ings .r i hr snectt ach ether s hat'upnna retardation of the hide edges the rings en.- gaging the same will also be retarded, the

remaining rings continuing on to maintain the forward or feeding, movement of the cen tral portion of the. hide. While this im-. proved construction has served a useful purpose, it still necessitates useof the loose laterally shiftable rings which frequently tilt and mark the leather upon encounteringv without causing-flexing of the remaining part of the roll out of driving or;feeding; engagement with the hide, thus obtaining the advantage in thisregard oftheloose laterally shiftablerings; and wherein certain of the sections are made of a fib rous composition or other equivalent material and function to. drive or feed thehide forward while, the remaining sections are made of metal and function toprotectthe former from injury by the knife, the first-named sections, permitting retardation ofthe edges or. skirts of'the hide without any great effort on the, part of the operator, thus obtaining the advantage in this regard of the rolls referred to above in which the loose sectionsareconnected for rotationtogether by means of slip connections.

Another object is-to provide .a ring-roll construction which is strong and durable, which is simple, andwhich eliminatesthe disadvantages inherent in such; rolls con; trii te er to o hi eiob ainingthe; p t v dv ntagesot thel tter-l t er. biegts. i dad ntages w l" ereint app ar-.1

E t pu r se tfi l stna ng. he. inven;

leather-splitting machine of the usual type;

Fig. 2 is a plan view of the improved ringroll;

Fig. 3 is an enlarged sectional view, taken on the line 3--3 of Fig. 2;

Fig. at is an enlarged sectional view, taken on the line 4-4: of Fig. 2; and

Fig. 5 is an enlarged sectional view, taken on the line 5-5 of Fig. 2.

Referring more particularly to Fig. 1, the improved ring-roll l is shown as being supported and arranged in the usual manner be tween the gage roll 2 and the relatively large rubber roll 3 which supports and drives the ring-roll by frictional engagement therewith, roll 3 being positively driven. The endless band knife a guided between bars 5 and 6 splits the hide 7 as the same is fed between rolls 1 and 2 to the cutting edge of the knife.

The improved ring-roll consists of a plurality of units, each comprising a central section 8 which may be made of the so-called micarta material, the latter being a paper or fibrous composition; and sections 9 and 10 which may be made of brass or other suitable material. For the purpose of fastening or holding sections 8, 9 and 10 of each unit in assembled relation, a bolt 11 is passed through the same, as shown in Fig. 3, and threaded at its ends to receive nuts 12 which are tightened against the ends of section 8 and held in position by suitable lock washers 13, and nuts 14 which are tightened against the outer ends of sections 9 and 10 and which may be held in position by means of lock washers 15. From the foregoing it will be seen that the nuts 14 hold sections 9 and 10 securely in position and against tilting with respect to sect on 8, the adjacent abutting ends of the sections being in tight engagement.

For the purpose of securing together these units comprising sections 8, 9 and 10, the outer ends of sections 10 are reduced and threaded into the adjacent ends of sections 9 to provide a i1iale-and-teinale connection or joint, as shown, sections 10 being screwed tightly into sections 9. This construction provides a ring or feed roll which is sutliciently r gid to obtain the advantage of rolls of this class constructed heretofore in a single rigid piece, in that the sections are securely held against any lateral or radial shifting with respect to each other or tilt ng upon encountering an irregularity in the hide, whiie, however, providing for sufiicient resiliency in the roll to permit the same to flex to accommodate any irregularity in the hide ordinarily encountered without causing flexing or distortion of the remaining part of the roll out of driving or feeding engagement with the hide, thus obtaining the advantage of the laterally shittable rings in such rolls constructed heretofore. The sections 8 which are made of the fibrous roar position act as driving elements to feed the hide to the cutting edge of the knife, while the metal sections 9 and 10 made of brass or other suitable material act to protect sections 8 from engagement with the knife edge when the hide has passed through rolls 1 and 2 or in the event that a bare spot in the hide pas es over one of the sections 8.

It will be seen that the improved construction is comparatively simple as compared with the construction of these rolls used heretofore and that the various parts comprising the improved roll are few in number and that the latter may be readily assembled and made at a comparatively small cost.

As shown in Figs. 4 and 5, pins 16 are threaded through the end sections 9 to pro vide suitable means for rotatably supporting roll 1 in the frame of the machine, the pair or" sections 9 1O at the right end of the roll, as indicated in Fig. 2 and shown in Fig. 5, being reversed so that one of the sections 9 will be at each end of the roll.

lVhile it has been. stated above that certain of the sections are made of a fibrous composition such as the so-called micarta material, and that the remaining sections are made of brass, it will be understood that the sections may be made of other suitable material as well. Furthermore, changes may be made in the size, shape and arrangement of the parts without departing from the spirit of the invention or the scope of the claims.

The invention claimed is:

1. A ring-roll of the character described comprising a plurality of sections, and means holding the same against lateral shitting with respect to each other and with their respective adjacent ends abutting, oer tain of said sections being made of fibrous composition, the remaining sections being made of metal and having smooth faces flush with the faces of the last-mentioned sections.

2. In a ring-roll of the character I de scribed, a plurality of sections, and means holding said sections in assembled relation, one end of one of said sections being reduced and threaded into the adjacent end of the next section.

3. A ring-roll of the character described comprising a plurality of units each comprising a central section and a section at each end of the latter, and means holding said sections in assembled relation, the adjacent ends of said units being externally and internally threaded respectively to provide a h1ale-and-fe1nale joint and being thereby secured together.

4. A ringroll of the character described comprising a plurality of pairs of metallic sections, the sections comprising each pair having their adjacent ends externally and internally threaded respectively to provide various a male-and-female connection and being secured together and held in assembled relatlon by means of said connect on, sections of fibrous composltion interposed between said pairs, and means extending through each of terposed between said first-named sections,

and means holding said sections in assembled relation.

6. A ring-roll comprising a rod made up of a plurality of disjointed sections, roll sections mounted in. abutting relationship on said rod, certain of said sections being connected to bridge the disjointed ends of said rod sections.

7. A ring-roll of the character described comprising a plurality of aligned sections,

and axially spaced aligned members, each of said members engaging certain of said sections to hold the same in assembled relation as a single unit, the respective adjacent end sections of adjacent units being rigidly connected. I

8. In a machine of the character described, a relatively fixed knife, a gage roll rotatably supported at one side of the knife edge, a ring-roll rotatably supported at the opposite side of the knife edge, and a drive roll supported in frictional driving relation with said ring-roll and urging the latter toward the knife edge, said ring-roll comprising a plurality of sections each having a smooth face flush with the faces of the other sections, and means holding said sections against lateral shifting with respect to each other and with their respective adjacent ends abutting, certain of said sections being made of a fibrous composition, the remaining sections being made of metal.

In witness whereof, I hereto afiix my signature.

AUGUST C. HAHLBECK. 

